RFR: 8253821: Improve ByteBuffer performance with GCM [v3]

[Anthony Scarpino]

On Tue, 3 Nov 2020 21:03:02 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

>> Anthony Scarpino has updated the pull request incrementally with six additional commits since the last revision:
>> 
>>  - style
>>  - style & comments
>>  - full update
>>  - remove old
>>  - update
>>  - outputsize
>
> src/java.base/share/classes/com/sun/crypto/provider/GaloisCounterMode.java line 541:
> 
>> 539:         throws IllegalBlockSizeException, ShortBufferException {
>> 540:         checkDataLength(processed, Math.addExact(len, tagLenBytes));
>> 541: 
> 
> Now that encrypt(byte[], int, int, byte[], int) may also store data into 'ibuffer', shouldn't this encryptFinal() method processes bytes in 'ibuffer' before processing 'in'? The check here would also needs to be updated with ibuffer.size()? If this is true, can this be covered in the added regression tests?

This is not an optimized path for bytebuffers and will never have any data in ibuffer.

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PR: https://git.openjdk.java.net/jdk/pull/411